381.24+18×1
    344.76+19.2×1.9
    0+16.9×20.4
    (（13.84×16.9+1.9×19.2+1×18+3.7×18.7）×3.14+22.6×9.59)/(0.8×18+0.9×18.3+20.4×16.9+1.9×19.2+1×18+3.7×18.7+50)
    (5890.20×1673)/(5120.52×1388)
    357.56×1.558+2×22.6×1.248
    288.37×1.558+2×22.6×1.248
    (288.37-16.74×10)×1.402+2×0×1.192+16.74×10
    (270.37-15.74×10)×1.402+2×0×1.192+15.74×10
    270.37×1.662+2×29×1.289
    233.89×1.662+2×29×1.289
    233.89×1.352+2×11.4×1.163
    233.89×1.662+2×29×1.289
    233.89×1.352+2×11.4×1.163
    0×1.352+2×11.4×1.163
    288.37+18.7×3.7
    270.37+18×1
    233.89+19.2×1.9
    0+16.9×13.84
    549.3×0.642-2×22.6×0.801

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